Classify the input using one of these labels: neutral, positive, and negative. @USAirways customer service at its best! Rachel S.  took great care of us at the PHX airport. http://t.co/HG7vEqhGHy
system
Classify the input using one of these labels: neutral, positive, and negative. @USAirways customer service at its best! Rachel S.  took great care of us at the PHX airport. http://t.co/HG7vEqhGHy
user
positive
assistant
system
Classify the input using one of these labels: neutral, positive, and negative. @USAirways customer service at its best! Rachel S.  took great care of us at the PHX airport. http://t.co/HG7vEqhGHy
user
neutral
assistant